Laws
For each products family are the laws which dictate the required for the electromagnetic compatibility and laws which dictate the required for the safety.There are laws for the informatics equipments (computers and affini), laws for the household appliance, laws for the medical equipments, etc.
Where these laws were not published wet it applies the generic laws which were issued for not leave the products without the rules.

The product laws application or, in the absence of these, the generic laws, the conformity presumption; this assure that this product is safe and can be put in the market. Like a final act the constructor put on the product the CE marking and writes the conformity declaration; this one must accompany the product with the use instructions.